Stationary mobile radio antenna

Abstract

An improved antenna arrangement includes a passive and electrically conductive element comprising a beamforming element. The at least one beamforming element is subdivided into at least two sections, specifically a mounting section and an operating section, which is connected to the area of the mounting section located further away from the reflector.

The invention claimed is: 
     
       1. A stationary mobile radio antenna comprising:
 a reflector, 
 at least one antenna element for operation in at least one polarization plane (PE), 
 at least one passive, electrically conductive element, which is at least indirectly electrically conductively connected or electrically capacitively coupled to the reflector, the passive, electrically conductive element comprising a beamforming element, 
 the at least one beamforming element being subdivided into at least two sections, including a mounting section and an operating section, which is connected to the area of the mounting section located further away from the reflector, 
 the operating section being disposed on an operating plane (WE), 
 the operating plane (WE) running parallel to, or differing from being parallel to by less than ±20°, at least in that section of the reflector in the area of the beamforming element and/or of the antenna element to be influenced thereby, 
 the length of the operating section being between 0.2λ and 1.0λ, where lambda (λ) is a wavelength in the frequency band to be transmitted, 
 the operating section or the operating plane (WE) being at a distance from the reflector in the area of the operating section, which distance is greater than or equal to 0.2λ and is less than or equal to 1.5λ, where lambda λ is the wavelength of the frequency band to be transmitted, 
 the length of the mounting section being shorter than a maximum of twice the wavelength 2 λ of the frequency band to be transmitted, 
 the operating section being aligned parallel to, or differing by less than ±20° from being parallel to the associated polarization plane (PE) of the antenna elements to be influenced thereby. 
 
     
     
       2. The antenna as claimed in  claim 1 , wherein the material thickness or the cross-sectional size of the mounting section and/or of the operating section is less than 0.1λ, where lambda λ is the wavelength of the frequency band to be transmitted. 
     
     
       3. The antenna as claimed in  claim 1 , wherein the mounting section lies at least essentially on the polarization plane (PE) of the antenna element arrangement. 
     
     
       4. The antenna as claimed in  claim 1 , wherein the operating section runs parallel to the dipole to be influenced via it, or at an angle of less than 20° to it. 
     
     
       5. The antenna as claimed in  claim 1 , wherein the length of the mounting section is greater than the distance between the operating section and the reflector. 
     
     
       6. The antenna as claimed in  claim 1 , wherein the foot point of the mounting section as well as its transition area or transition point which is located at a distance from the reflector and at which the operating section starts, is located at least approximately on the same polarization plane (PE) as the antenna element. 
     
     
       7. The antenna as claimed in  claim 1 , wherein, in the case of a linear-polarized antenna element, the mounting section and the operating section of the beamforming element lie substantially on the polarization plane (PE) of the linear-polarized antenna element. 
     
     
       8. The antenna as claimed in  claim 1 , wherein at least two beamforming elements are provided for each polarization. 
     
     
       9. The antenna as claimed in  claim 8 , wherein the at least two beamforming elements which are provided at least for each polarization are arranged symmetrically with respect to a plane of symmetry which runs at right angles to the polarization plane (PE) and at right angles to the reflector through the center on the associated antenna element. 
     
     
       10. The antenna as claimed in  claim 1 , wherein a dual-polarized antenna element arrangement comprises at least two beamforming elements. 
     
     
       11. The antenna as claimed in  claim 10 , wherein the operating section runs parallel to one of the two mutually perpendicular polarization planes. 
     
     
       12. The antenna as claimed in  claim 10 , wherein the mounting section runs on a polarization plane W (PE). 
     
     
       13. The antenna as claimed in  claim 10 , wherein the operating section is aligned at least approximately at right angles, to the mounting section on which it is mounted. 
     
     
       14. The antenna as claimed in  claim 1 , wherein, in a plan view of a dual-band or multiband antenna, at least parts of the operating sections are arranged such that they are located at least approximately at the same lateral distance from the side boundary of the reflector as the associated parallel dipole halves of adjacent antenna elements for transmission in a lower frequency band. 
     
     
       15. The antenna as claimed in  claim 14 , wherein the operating sections lie on an operating plane (WE) which corresponds to the antenna element plane of the antenna elements which emit in a higher frequency band. 
     
     
       16. The antenna as claimed in  claim 1 , wherein the operating sections are arranged parallel to the dipole halves of adjacent antenna elements which are provided for transmission in a lower frequency band. 
     
     
       17. The antenna as claimed in  claim 1 , wherein, in a plan view of the antenna arrangement, the operating section lies on an extension of the associated mounting section. 
     
     
       18. The antenna as claimed in  claim 1 , wherein the alignment of the operating section is aligned to be copolar with the respective active element, in particular in the form of an antenna element, to be influenced thereby, on the polarization plane (PE) of an antenna element.